The 500 Chainsaw is named after the unique chainsaw-style handled grip which provides this pistol-gripped model added muzzle control. Its tri-rail forend (with removable siderails) makes mounting your picatinny accessories a snap.
I wasn’t aware that muzzle control on a pump shotgun was such a hard thing to attain without such an accessory. 😛 Gotta love that is has 3 rails and a pistol grip with it too. If I had this, for kicks I’d mount an ACOG, a high powered optic, and a laser on each rail.
It’s not on the Mossberg website, nor can I find it in their online catalog.
Haters gonna hate. <– This pretty much sums it up.